CN108433698A - One kind disappears ghost fundus camera lighting system - Google Patents
One kind disappears ghost fundus camera lighting system Download PDFInfo
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- CN108433698A CN108433698A CN201810335580.8A CN201810335580A CN108433698A CN 108433698 A CN108433698 A CN 108433698A CN 201810335580 A CN201810335580 A CN 201810335580A CN 108433698 A CN108433698 A CN 108433698A
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- 210000000695 crystalline len Anatomy 0.000 claims abstract description 77
- 238000005286 illumination Methods 0.000 claims abstract description 43
- 230000010287 polarization Effects 0.000 claims abstract description 29
- 210000001747 pupil Anatomy 0.000 claims abstract description 24
- 239000013307 optical fiber Substances 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 8
- 210000000887 face Anatomy 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000009738 saturating Methods 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 2
- 238000007747 plating Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 238000003384 imaging method Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 13
- 210000004087 cornea Anatomy 0.000 description 10
- 238000004088 simulation Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 241000276498 Pollachius virens Species 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
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- 206010073261 Ovarian theca cell tumour Diseases 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
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- 230000002708 enhancing effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
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- 208000001644 thecoma Diseases 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/12—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/14—Arrangements specially adapted for eye photography
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Abstract
Disappear ghost fundus camera lighting system the invention discloses one kind, the main points of its technical scheme are that including beam splitter successively from the object side to the image side, collimation lens, light collection system, field stop, polarizing beam splitter, speculum, field lens, the first polarization spectro piece, connecing mesh object lens, second light source is equipped with equipped with first light source, in the upside of the beam splitter in the left side of the beam splitter；The light that the first light source and second light source are launched passes through beam splitter successively, collimation lens, light collection system form primary picture in field stop, then in turn through polarizing beam splitter, speculum, field lens, the first polarization spectro piece, connects the hot spot that mesh object lens form field stop shape in eye pupil or crystalline lens.For the present invention for traditional illumination system, structure is simpler, and illumination is more uniform, and the ghost effect that disappears is more preferable.
Description
【Technical field】
Disappear ghost fundus camera lighting system the present invention relates to one kind.
【Background technology】
Since eyeground itself does not shine, and pupil diameter does not exceed 3mm, demand lighting apparatus irradiation light generally daytime
Uniform Illumination and imaging are realized by so small clear aperture simultaneously with imaging device light, and do not generate ghost, tradition
Ring illumination to require lighting source be that annular array area source adds annular diaphragm either directly using photograph outside optical fiber
Bright not share eyeglass with imaging system, the area that the hot spot of the ring illumination accounts for pupil can larger, leaves for and is imaged emergent pupil area
It will lack, and the two easy tos produce crystalline lens ghost if overlapping, and can cause imaging entrance pupil small in this way, light efficiency is low or shines
Bright uneven, traditional lighting does not eliminate cornea ghost by the way of polarizing film, but by the way of low-angle by light source at
Picture is in cornea, although cornea ghost can be solved, crystalline lens ghost can not solve, if irradiating angle increases to 45 ° or more,
Which necessarily leads to cornea ghost or crystalline lens ghost, is illuminated outside the optical fiber and does not share eyeglass with imaging system and lead to structure
Not compact, outside eyes, illumination is difficult to homogenize illuminating ray optical center, and ghost is more prone to compared to ring illumination.
Application No. is 201510216416.1 Chinese invention patent applications, disclose a kind of fundus camera lighting system,
Referring to the patent application specification attached drawing 1, for the lighting system which uses for kohler's illumination, hot spot is ring
Shape hot spot, which light angle is small, at 30 ° or so, can to avoid corneal reflection, but hot spot be easy in crystalline lens with
The emergent pupil of imaging system overlaps, and leads to lenticular reflection ghost, when light angle increases to 45 ° or more, which can not yet
Avoid cornea ghost, at the same ring-shaped light spot account for pupil area it is larger, to avoid crystalline lens ghost necessarily and cause being imaged emergent pupil and become
Small, brightness of image is dimmed to be equivalent to the enhancing of ghost effect.
The present invention is namely based on what such case was made.
【Invention content】
The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a kind of illuminations more uniformly, the ghost effect that disappears is more preferable
The ghost fundus camera lighting system that disappears.
The present invention is achieved by the following technical solutions：
One kind disappears ghost fundus camera lighting system, it is characterised in that：Include beam splitter, standard successively from the object side to the image side
Straight lens 10, field stop 11, polarizing beam splitter 3, speculum 7, field lens 8, the first polarization spectro piece 9, connect mesh at light collection system 4
Object lens 6 are equipped with second light source 2 in the left side of the beam splitter equipped with first light source 1, in the upside of the beam splitter；Described
The light that one light source 1 and second light source 2 are launched passes through beam splitter, collimation lens 10, light collection system 4 in field stop 11 successively
It is upper to form primary picture, then in turn through polarizing beam splitter 3, speculum 7, field lens 8, the first polarization spectro piece 9, connect mesh object lens 6
The hot spot of field stop shape is formed in eye pupil or crystalline lens.
The ghost fundus camera lighting system as described above that disappears, it is characterised in that：The first light source 1 and optical axis bias and
It tilts, the second light source 2 and optical axis bias and inclination.
The ghost fundus camera lighting system as described above that disappears, it is characterised in that：The beam splitter is Amici prism 5, institute
Amici prism 5 is stated to be obliquely installed.
The ghost fundus camera lighting system as described above that disappears, it is characterised in that：The first light source 1 is white LED lamp
101, white LED lamp 101 is taken pictures using Flash Mode；The second light source 2 is infrared LED lamp 201, infrared LED lamp
201 are observed in real time using light illumination mode is continued, and the plated film of 5 cemented surface of the Amici prism is high to visible light thoroughly, to infrared
Light is high anti-.
The ghost fundus camera lighting system as described above that disappears, it is characterised in that：The first light source 1 is infrared LED lamp
201, infrared LED lamp 201 is observed in real time using light illumination mode is continued；The second light source 2 is white LED lamp 101, white light
LED light 101 is taken pictures using Flash Mode, and the plated film of 5 cemented surface of the Amici prism is high to visible light anti-, to infrared light
It is high saturating.
The ghost fundus camera lighting system as described above that disappears, it is characterised in that：The collimation lens 10 is using biconvex
Aspherical, the faces R2 of collimation lens 10 are more convex compared with the faces R1 of collimation lens 10.
The ghost fundus camera lighting system as described above that disappears, it is characterised in that：The light collection system 4 includes four mirrors
Piece, wherein including first lens set 401 composed by two panels eyeglass, the shape of the field stop 11 is arc, institute
It states field lens 8 and uses non-spherical lens, the polarization transmission axis direction of the first polarization spectro piece 9 is orthogonal with polarizing film, described to connect
Mesh object lens 6 use three-chip type structure, wherein including second lens set 601 composed by two panels eyeglass.
The ghost fundus camera lighting system as described above that disappears, it is characterised in that：The beam splitter is light splitting piece.
The ghost fundus camera lighting system as described above that disappears, it is characterised in that：The polarizing beam splitter 3 is half-reflection and half-transmission
Any one in the combination of mirror 301 and polarizing film 302, the second polarization spectro piece 303 and polarization splitting prism.
The ghost fundus camera lighting system as described above that disappears, it is characterised in that：The first light source 1 and second light
Source 2 is optical fiber source.
Compared with prior art, the present invention has the following advantages：
1, for the present invention for traditional illumination system, structure is simpler, and illumination is more uniform, disappears ghost effect more
It is good.
【Description of the drawings】
Fig. 1 is the light path schematic diagram of illumination system embodiment of the present invention one；
Fig. 2 is the structural schematic diagram of illumination system embodiment of the present invention one, and light path is only decorated at polarizing beam splitter in figure；
Fig. 3 is the structural schematic diagram of illumination system embodiment of the present invention two, and light path is only decorated at polarizing beam splitter in figure；
Fig. 4 a are illumination arc Spots simulation effect diagram of the present invention at eye pupil；
Fig. 4 b are lighting simulation Illumination Distribution schematic diagram of the present invention on eyeground；
Fig. 4 c are lighting simulation Energy distribution schematic diagram of the present invention on eyeground；
Fig. 4 d are not added with polarizing film and ghost schematic diagram when hot spot focuses on eye pupil on COMS；
Fig. 5 a are not added with polarizing film and ghost schematic diagram when hot spot focuses in crystalline lens on COMS；
Fig. 5 b are the schematic diagram eliminated after ghost for adding polarizing film and hot spot and focusing in crystalline lens on constantly COMS；
Fig. 6 a are one of the aberration curve schematic diagram of present illumination system；
Fig. 6 b are the two of the aberration curve schematic diagram of present illumination system；
Fig. 6 c are the disperse spot schematic diagram of present illumination system.
In figure：1 is first light source；101 be white LED lamp；2 be second light source；201 be infrared LED lamp；3 be polarization point
Light device；301 be half-reflecting half mirror；302 be polarizing film；303 be the second polarization spectro piece；4 be light collection system；401 be the first mirror
Piece group；5 be Amici prism；6 be to connect mesh object lens；601 be the second lens set；7 be speculum；8 be field lens；9 be the first polarization point
Mating plate；10 be collimation lens；11 be field stop.
【Specific implementation mode】
The technology of the present invention feature is described in further detail in order to the field technology personnel energy below in conjunction with the accompanying drawings
It is enough to understand.
One kind ghost fundus camera lighting system that disappears includes beam splitting successively from the object side to the image side as shown in Fig. 1 to Fig. 6 c
Device, collimation lens 10, light collection system 4, field stop 11, polarizing beam splitter 3, speculum 7, field lens 8, the first polarization spectro piece 9,
Mesh object lens 6 are connect, second light source 2 is equipped with equipped with first light source 1, in the upside of the beam splitter in the left side of the beam splitter.
The first light source 1 can be white LED lamp 101, and the second light source 2 can be infrared LED lamp 201, i.e. institute
State white LED lamp 101 and infrared LED lamp 201 place respectively as Fig. 1 Amici prisms 5 left side and upside and with optical axis bias and
It tilts, wherein the eccentric edge for alloing illumination spot to be located at eye pupil clear aperture, tilts the limit that can compensate LED distribution curve fluxs
Problem of non-uniform caused by system and chief ray incidence angles not 0 deg, in this way illumination can be more uniform, and white LED lamp 101 is using flash of light
Lamp pattern is taken pictures, and infrared LED lamp 201 is observed in real time using light illumination mode is continued, and the beam splitter can be light splitting
Prism 5 or light splitting piece, the Amici prism 5 are obliquely installed certain angle, prevent light larger in prism facets incidence, cause anti-
Penetrate rate height.
According to the difference of light source position, the plated film mode of 5 cemented surface of Amici prism is also different, can be the mode such as Fig. 1
LED is placed, i.e., the described first light source 1 is white LED lamp 101, and the second light source 2 is infrared LED lamp 201, the light splitting rib
The plated film of 5 cemented surface of mirror is high to visible light thoroughly, high to infrared light anti-.
If the first light source 1 is infrared LED lamp 201, the second light source 2 is white LED lamp 101, white LED lamp
101 are taken pictures using Flash Mode, and infrared LED lamp 201 is observed in real time using light illumination mode is continued, the light splitting rib
The plated film of 5 cemented surface of mirror is high to visible light anti-, high to infrared light saturating.Height is highly transmissive abbreviation thoroughly, it is high it is counter be high reflection letter
Claim.
The collimation lens 10 is aspherical using biconvex, the faces R2 of collimation lens 10 compared with collimation lens 10 the faces R1 more
It is convex.Light has effectively been collimated in this way, has reduced angular aperture, has been laid a good groundwork for the light harvesting of subsequent optical path.
The light collection system 4 includes four eyeglasses, wherein including first lens set composed by two panels eyeglass
401, the shape of the field stop 11 is arc, takes full advantage of the clear aperture of eye pupil and effectively makes going out for imaging system
Pupil picture is detached with illumination spot in crystalline lens, and the field lens 8 uses non-spherical lens, for correcting the ball of large aperture angle generation
The coma and the curvature of field that difference and light source bias generate.The polarization transmission axis direction of the first polarization spectro piece 9 is orthogonal with polarizing film,
The cornea ghost for entering imaging system is set to eliminate.The mesh object lens 6 that connect use three-chip type structure, wherein comprising one by two panels
The second lens set 601 that eyeglass composes.
The polarizing beam splitter 3 is the combination of half-reflecting half mirror 301 and polarizing film 302, the second polarization spectro piece 303 and partially
Any one shaken in Amici prism.The half-reflecting half mirror 301 is used for importing the light of fixation mark system transmitting, the polarization
Piece 302 is used for being polarized.The speculum 7 enables imaging system to import for light path of transferring.The polarization point of the embodiment of the present invention one
Light device 3 using half-reflecting half mirror 301 and polarizing film 302 combination, as depicted in figs. 1 and 2.Embodiment two is using
Two polarization spectro pieces 303, as shown in figure 3, two embodiment other parts are identical.
The first light source 1 and the second light source 2 are optical fiber source.I.e. above-mentioned LED lamp source can use optical fiber source
Instead of.Further, first light source 1 is white optical fiber source, and second light source 2 is red optical fiber source；Or first light source 1 is
Red optical fiber source, second light source 2 are white optical fiber source, and accordingly the plated film mode of Amici prism cemented surface also can be different.
Arc hot spot is used in order to eliminate the crystalline lens ghost present invention, arc width is 0.7mm left to design hot spot as shown in fig. 4 a
The right side, outer arc radius be 1.5mm eye pupils in, inner arc radius be 1mm, the heart with respect to eye pupil the center upwards circle of inclined 0.5mm outside, this
Sample imaging system emergent pupil and lighting system arc hot spot are misaligned in crystalline lens, to avoid crystalline lens from carrying birefringent characteristic
Reflection, this kind reflection can not be filtered out with polarizing film.The object height -1 provided when design arrives -2mm, also close to -1 and -2mm after imaging
So magnifying power is 1, such eyes need to offset downward 0.5mm relative to connecing mesh objective lens optical axis, and in order to which made allowance needs to use
Field stop blocks light according to object-image relation, and finally the illumination spot shape in crystalline lens is the arc of 0.7mm wide, forms ability
Meet the requirement for eliminating crystalline lens ghost.
The operating distance of usual fundus illumination system is 20~40mm, the present invention provide connect mesh object lens to eyes entrance pupil away from
From for 26mm, since the distance of cornea to eye pupil is 3.71mm, when the distance that simulation obtains connecing mesh object lens cornea is 22.86mm,
Hot spot is minimum, and needs to reduce this distance in actual use and hot spot is allowed to focus in crystalline lens so operating distance is 20.86mm
To 21.86mm.
What improved the application used is also kohler's illumination mode, and hot spot is arc hot spot, and which leaves imaging system for
The area of system emergent pupil can be bigger than the area of annular, and brightness of image, which brightens, is equivalent to ghost decreased effectiveness, and light angle is 47 ° of left sides
The right side can be eliminated although corneal reflection can not be avoided using polarizing film, and crystalline lens carries ghost and lighting system may be used
The hot spot mode misaligned with imaging system emergent pupil is eliminated.
Lighting source is designed, 1 white LED lamp and infrared LED lamp, public illumination system is respectively adopted in the present invention
System effectively less number of lenses, the ghost design sketch on fundus illumination design sketch and CMOS, utilizes Lighttools7 in order to obtain
Software is simulated, and simulation input light number is 2500000, and opposite light power threshold is 1E-5, and light source is 1.4mm radiuses
Ball-type area source, spectrum be positive white-light spectrum.The design sketch of simulation is as shown in figure 4, Fig. 4 a are hot spot focuses at eye pupil and be
Hot spot, Fig. 4 b are the Illumination Distribution figure on eyeground, the energy profile on the eyeground Fig. 4 c, and Fig. 4 d are the ghost of CMOS not plus when polarizing film
Shadow schematic diagram.It checks that Fig. 4 b can be seen that fundus illumination is relatively uniform, checks that Fig. 4 c can obtain the uniformity on eyeground, the uniformity
Calculation formula is
Wherein ZhaoMing Center's illumination Pcenter=13.1lx, P at 85% position in illumination region85%=12.5lx illumination regions
Interior illumination maximum value Pmax=13.6lx.
The uniformity U=95.6% in 47 ° of illumination regions can be calculated according to above-mentioned formula, meets lighting requirement.
Check that Fig. 4 d can be seen that hot spot focuses on and not add polarizing film at eye pupil, the upper ghosts of COMS are more, topmost most
Bright is cornea ghost, and center round shape ghost is the ghost for connecing the reflection of mesh object lens, and nethermost arcuation ghost reflects for crystalline lens
Ghost checks that Fig. 5 a discoveries focus on hot spot in crystalline lens, it can be seen that the arc ghost of crystalline lens internal reflection is eliminated, and is checked
Ghost when Fig. 5 b can be seen that addition polarizing film and polarization spectro piece on CMOS is eliminated.
Principle described above is that the light transmission shaft of polarizing film and polarization spectro piece is orthogonal, and mirror-reflection does not change polarization
Characteristic, so the light of corneal reflection can not be eliminated by polarization spectro piece, cornea ghost, and the diffusing reflection on eyeground have it is depolarized
Shake characteristic, thus the light on eyeground can part by polarization spectro piece, to camera COMS imagings, and since crystalline lens has birefringence
Special efficacy, so the ghost that the light of crystalline lens internal reflection is formed in COMS can not be completely eliminated by polarizing film.
The image quality of lighting system is stringent not as imaging system requires, but the relationship between quality being imaged is to being imaged
Brightness, if in this way ghost effect it is constant in the case of, image quality is better, and the effect for eliminating ghost is better, and 47 ° illumination
Aperture relative to the big many in 30 ° of traditional lighting apertures, in this way using it is aspherical be exactly indispensable.Check that Fig. 6 a can
To find out that the curvature of field and distortion are all smaller, Fig. 6 b can be seen that difference in 100 μm, and Fig. 6 c can be seen that GEO spot radius exists
In 91 μm, in 42 μm of RMS spot radius, imaging effect is good, meets image quality requirement.
The ghost fundus camera lighting system provided by the invention that disappears, for traditional illumination system, structure is simpler
Single, illumination is more uniform, and the ghost effect that disappears is more preferable.
Embodiment of the present invention is only the description carried out to the preferred embodiment of the present invention, not to invention structure
Think and range is defined, under the premise of not departing from design philosophy of the present invention, engineers and technicians are to the present invention in this field
The all variations and modifications made of technical solution, protection scope of the present invention should all be fallen into.
Claims (10)
- The ghost fundus camera lighting system 1. one kind disappears, it is characterised in that：Include beam splitter, collimation successively from the object side to the image side Lens (10), light collection system (4), field stop (11), polarizing beam splitter (3), speculum (7), field lens (8), the first polarization point Mating plate (9) connects mesh object lens (6), is equipped with equipped with first light source (1), in the upside of the beam splitter in the left side of the beam splitter Second light source (2)；The light that the first light source (1) and second light source (2) are launched passes through beam splitter, collimation lens successively (10), light collection system (4) forms primary picture in field stop (11), then in turn through polarizing beam splitter (3), speculum (7), field lens (8), the first polarization spectro piece (9), connect mesh object lens (6) and form field stop shape in eye pupil or crystalline lens Hot spot.
- 2. the ghost fundus camera lighting system according to claim 1 that disappears, it is characterised in that：The first light source (1) with Optical axis is eccentric and tilts, the second light source (2) and optical axis bias and inclination.
- 3. the ghost fundus camera lighting system according to claim 2 that disappears, it is characterised in that：The beam splitter is light splitting rib Mirror (5), the Amici prism (5) are obliquely installed.
- 4. the ghost fundus camera lighting system according to claim 3 that disappears, it is characterised in that：The first light source (1) is White LED lamp (101), white LED lamp (101) are taken pictures using Flash Mode；The second light source (2) is infrared LED Lamp (201), infrared LED lamp (201) are observed in real time using light illumination mode is continued, the plating of Amici prism (5) cemented surface Film is high to visible light thoroughly, high to infrared light anti-.
- 5. the ghost fundus camera lighting system according to claim 3 that disappears, it is characterised in that：The first light source (1) is Infrared LED lamp (201), infrared LED lamp (201) are observed in real time using light illumination mode is continued；The second light source (2) is white Light LED light (101), white LED lamp (101) are taken pictures using Flash Mode, the plated film of Amici prism (5) cemented surface It is high to visible light anti-, it is high to infrared light saturating.
- 6. the ghost fundus camera lighting system according to claim 1 that disappears, it is characterised in that：The collimation lens (10) is adopted Aspherical with biconvex, the faces R2 of collimation lens (10) are more convex compared with the faces R1 of collimation lens (10).
- 7. the ghost fundus camera lighting system according to claim 1 that disappears, it is characterised in that：Light collection system (4) packet Four eyeglasses are included, wherein including first lens set (401) composed by two panels, the shape of the field stop (11) is Arc, the field lens (8) use non-spherical lens, the polarization transmission axis direction of the first polarization spectro piece (9) and polarizing film Orthogonal, the mesh object lens (6) that connect use three-chip type structure, wherein including second lens set (601) composed by two panels.
- 8. the ghost fundus camera lighting system according to claim 1 that disappears, it is characterised in that：The beam splitter is light splitting Piece.
- 9. the ghost fundus camera lighting system according to claim 1 that disappears, it is characterised in that：The polarizing beam splitter (3) For appointing in the combination of half-reflecting half mirror (301) and polarizing film (302), the second polarization spectro piece (303) and polarization splitting prism Meaning is a kind of.
- 10. the ghost fundus camera lighting system according to claim 1 that disappears, it is characterised in that：The first light source (1) with The second light source (2) is optical fiber source.
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| CN201810335580.8A CN108433698A (en) | 2018-04-16 | 2018-04-16 | One kind disappears ghost fundus camera lighting system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109683301A (en) * | 2019-02-01 | 2019-04-26 | 宁波永新光学股份有限公司 | One kind just setting microscopical lighting device |
| CN114640791A (en) * | 2022-01-27 | 2022-06-17 | 浙江大华技术股份有限公司 | Lens angle adjusting method and device, computer equipment and camera |
| CN117204805A (en) * | 2023-07-05 | 2023-12-12 | 李抄 | Objective analysis optical system for analyzing visual quality |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002057081A (en) * | 2000-08-07 | 2002-02-22 | Nikon Corp | Illumination optical apparatus, exposure apparatus and exposure method |
| US20130335704A1 (en) * | 2010-12-13 | 2013-12-19 | University Of Virginia Patent Foundation | Intuitive techniques and apparatus for ophthalmic imaging |
| CN104605812A (en) * | 2015-01-21 | 2015-05-13 | 佛山市智海星空科技有限公司 | System for eliminating eye ground camera stray light |
| CN104757934A (en) * | 2015-04-27 | 2015-07-08 | 奉化科创科技服务有限公司 | Fundus camera lighting system |
| CN106551675A (en) * | 2015-09-30 | 2017-04-05 | 苏州速迈医疗设备有限公司 | A kind of binocular indirect ophthalmoscope with polarization function |
| CN208799204U (en) * | 2018-04-16 | 2019-04-30 | 中山联合光电科技股份有限公司 | A kind of novel ghost fundus camera lighting system that disappears |
-
2018
- 2018-04-16 CN CN201810335580.8A patent/CN108433698A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002057081A (en) * | 2000-08-07 | 2002-02-22 | Nikon Corp | Illumination optical apparatus, exposure apparatus and exposure method |
| US20130335704A1 (en) * | 2010-12-13 | 2013-12-19 | University Of Virginia Patent Foundation | Intuitive techniques and apparatus for ophthalmic imaging |
| CN104605812A (en) * | 2015-01-21 | 2015-05-13 | 佛山市智海星空科技有限公司 | System for eliminating eye ground camera stray light |
| CN104757934A (en) * | 2015-04-27 | 2015-07-08 | 奉化科创科技服务有限公司 | Fundus camera lighting system |
| CN106551675A (en) * | 2015-09-30 | 2017-04-05 | 苏州速迈医疗设备有限公司 | A kind of binocular indirect ophthalmoscope with polarization function |
| CN208799204U (en) * | 2018-04-16 | 2019-04-30 | 中山联合光电科技股份有限公司 | A kind of novel ghost fundus camera lighting system that disappears |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109683301A (en) * | 2019-02-01 | 2019-04-26 | 宁波永新光学股份有限公司 | One kind just setting microscopical lighting device |
| CN114640791A (en) * | 2022-01-27 | 2022-06-17 | 浙江大华技术股份有限公司 | Lens angle adjusting method and device, computer equipment and camera |
| CN117204805A (en) * | 2023-07-05 | 2023-12-12 | 李抄 | Objective analysis optical system for analyzing visual quality |
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